Yep, that's exactly what my voice has been doing for the past couple weeks! It did it to a lesser degree shortly after I started AndroGel, but it's more pronounced now that I'm taking injectable T. At first I thought I just had allergies, but then people started telling me my voice was actually getting deeper in addition to sounding like I have a cold.
As for height: How old are you, if you don't mind my asking? I'm 22 and finished growing close to a decade ago, so I think my growth plates are mostly closed off. I have grown maybe 1/4 to 1/2 an inch over the past few years, but I think that's more just a miniature young-adult growth spurt (which aren't unheard of) than a direct effect of the T.